import java.io.*;

class Nil extends Node {
	public Nil() {
	}

	public void print(int n) {
		print(n, false);
	}

	public void print(int n, boolean p) {
		for (int i = 0; i < n; i++)
			System.out.print(" ");

		if (p) {
			System.out.println(")");
		} else {
			System.out.println("()");
		}
	}
}
